docs: def result_report_class_wise_average(self):
          """Report class-wise averages
  
          Returns
          -------
          str
              result report in string format
  
          """
  
          results = self.results_class_wise_average_metrics()
  
          output = self.ui.section_header('Class-wise average metrics (macro-average)', indent=2) + '\n'
  
          output += self.ui.line('Accuracy', indent=2) + '\n'
          output += self.ui.data(field='Accuracy',
                                 value=float(results['accuracy']['accuracy']) * 100, unit='%', indent=4) + '\n'
  
          return output